#define _CRT_SECURE_NO_WARNINGS

#include <stdio.h>

void swap(int* px, int* py) {
	int z = *px;
	*px = *py;
	*py =  z;
};


int main()
{
	int a = 0;
	int b = 0;
	scanf("%d %d", &a, &b);
	printf("%d %d\n", a, b);
	swap(&a, &b);
	printf("%d %d", a, b);

	return 0;
}